Method of producing hydrocyanic acid



-Patented Apr. 2, l.

CARL BEINDL, QF FKFORT -ON-THE-MATH, GMANY.

METHOD OF PRODUGING YDROCYANIG ACID.

Ho Drawing.

To all whom it"may concern:

Be it known that I, CARL BEINDL, a. citiz"n of the Republic of Germany, residing ,at Frankfort-on-theeMain, Germany. have invented a certain neviiand useful Method of Producing Hydrocyanic Acid, of. which portant to use pure reaction gases but recent researches have shown that the addition of other gases than those constituting the .final product are of advantage, the kind and amount of additional gas depending on the nature of the catalysts. The addition of from 2 to 5% of oxygen orof air has been found advantageous.

It has also been found, hat limited quantities of free nitrogen increase the yield of hydrocyanic acid either by entering into the react-ionor by retarding the decomposition ofthe product. The nitrogen added for this purpose can be mixed with the reaction gases as such or together with oxygen, as for example, when airis added to the reaction gases. I

The following substances can be "used as contact substances, e. g. uranium, tungsten,

titanium, rhodium, osmium, molybdenum,

magnesium,.aluminum, the elements of the.

iron group, the group of the rareearth metals, further alloys and compounds of the said metals or substances, which either contain the said metals or compounds thereof.

chamber.

Application filed April 6, 1923. Serial lt'o. 636,405.

.It has been further found that pet tionlarly good yields'can be obtained by using 4 5 mixtures of more than one contact substance, 1n such proportlons that one constituent predominates. Contact bodies may be prepared from such compounds as the carbonates, nitrates or oxides of the respective metals. The preferred method of preparing them is by subjecting these compounds to the action of the reaction gases at an elevated temperature in the contact may consist of mixtures of metal, metal nitride, and metal oxide and show excellent catalytic efiects oy'fjong periods. The catalysts can be furtherfactivated by the The contact bodies so formed addition of alkali metals, alkali earth metals, to

or earth metals.

:What I claim is:

LThe method of producing hydrocyanic acid which comprises passing volatile nitrogen compounds with volatile carbon comc5 pounds over heated contact material together with small quantities of oxygen. 2. The method of producing'hydrocyanic acid which comprises passing volatile nitrogen compounds with volatile carbon comflu pounds over heated contact material together with small quantities of oxygen and nitrogen.

3.; The method of producing hydrocyanic acid which comprises passing volatile-nitrogen compounds with volatile carbon com-v pounds over heated contact material togetherwith about from 2 to 5% of air.

Intestimony whereof I have signed my name to this specification in the presence 30 of two. subscribing witnesses.

h cant. nnnmt. Witnessfi:

Bus E. Severn),

' 0 0; L. B. Wines. 

